HTTP协议报文、工作原理及Java中的HTTP通信技术详解

如URI：http://user:pass@www.example.com:80/home/index.html?age=11#mask

class ReadByGet extends Thread{
@Override
public void run(){
URL url = new URL("网址");//如果有参数，在网址中携带参数
URLConnection conn = url.openConnection();
InputStream is = conn.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);

String line;
StringBuilder builder = new StringBuilder();
while((line=br.readLine())!=null){
builder.append(line);
}
br.close();
isr.cloae();
is.close();

System.out.println(builder.toString);
}
}
public static void main(String[] args){
new ReadByGet().start();
}

Class ReadByPost extends Thread{
@override
public void run(){
URL url = new URL("网址");
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.addRequestProperty("encoding","UTF-8");
conn.setDoInput(true);
Conn.setDoOutput(true);
conn.setRequestMethod("POST");

OutputStream os = conn.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os);
BufferedWriter bw = new BufferedWriter(osw);

bw.write("向服务器传递的参数");
bw.flush();

InputStream is = conn.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;
StringBuilder builder = new StringBuilder();
while((line = br.readLine())!=null){
builder.append(line);
}
//关闭资源
System.out.println(builder.toString);
}
}
public static void main(){
new ReadByPost().start();
}

class Get extends Thread{

HttpClient client = HttpClients.createDefault();
@Override
public void run(){

HttpGet get = new HttpGet("http://www.baidu.com");

HttpResponse response = client.execute(get);
HttpEntity entity = response.getEntity();
String result = EntityUtils.toString(entity,"UTF-8");

System.out.println(result);

}
}
public static void main(String[] args){
new Get().start();
}

class Post extends Thread{
HttpClient cilent = HttpClients.CreateDefault();
@Override
public void run(){
HttpPost post = new HttpPost("网址");
//设置要传的参数
List<BasicNameValuePair> parameters = new ArratList();
parameters.add(new BasicNameValuePair("key","value"));

post.setEntity(new UrlEncodeFormEntity(parameters,"UTF-8"));
HttpResponse response = client.execute(post);
HttpEntity entity = response.getEntity();
String result = EntityUtils.roString(entity,"UTF-8");

System.out.println(result);

}
}
main(){
new Post().start();
}